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    Wyświetlanie 1-4 z 4
    Tytuł:
    Power-saving voltage-to-current conversion with the use of CMOS differential amplifier
    Autorzy:
    Wojtyna, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/398104.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    analog signal processing
    differential amplifier
    CMOS electronics
    low-power analog circuits
    analogowe przetwarzanie sygnałów
    wzmacniacz różnicowy
    CMOS
    obwody niskiego napięcia
    Opis:
    Differential amplifiers are well known as input stage preamplifiers. This is because they exhibit the ability to reduce unwanted common-mode effects considerably. As a consequence, both noise and input signal of the amplifier can have low values. Proper operation of differential amplifiers is possible when implemented in chip form. For typical use of such CMOS amplifiers, input signals are delivered to differential-pair gate-terminals while tail terminal is used to ensure the required bias of the pair. The paper shows that the roles of gates and tail terminal can be changed. In other words, the tail current can be used as input signal while the gate ones as voltages controlling the amplifier gain. This enables to combine the achievable low noise with power efficient operation of the circuit. Necessary conditions for that are discussed in this paper. Suitability of atypically used differential amplifiers for voltage-to-current conversion is explained. Two examples of CMOS circuits implementing power economic conversion of this type are presented.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2015, 6, 3; 96-101
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upgraded low voltage analog Current-to-Voltage converter with negative feedback
    Autorzy:
    Wojtyna, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/397781.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    analog signal processing
    current-to-voltage converters
    feedback theory
    analog CMOS electronics
    analogowe przetwarzanie sygnałów
    przetworniki prądowo-napięciowe
    teoria sprzężenia zwrotnego
    CMOS
    Opis:
    In this paper, an improved version of a current to voltage (C-V) converter is proposed. As compared to the previous version, the number of used transistors has been reduced by 1 and equals 7. The main results of this change are: an improvement of the circuit transfer function linearity, reduction the converter input resistance and decrease of the required supply voltage. Improvements in the considered converter results not only from the reduction of the number of the used transistors but also from the proposed realization of the feedback loop. In this way, it was possibly to get a strong loop gain. As a results, the achieved minimum supply voltage has been reduces from 2V, in case of the previous published converter version, to as low level as 1.2 V, in the case of the newly proposed solution. As for the linearity of the C-V transfer function, apart from its strong loop gain, an important role play also output transistors operating in a small drain to source region (linear region). Working in this region, one obtains a quasi linear voltage to current relationship. The theoretical and simulation results are in a good agreement and are promising.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2017, 8, 2; 80-84
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Versatile low-output-resistance low-voltage current-to-voltage analog converter
    Autorzy:
    Wojtyna, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/397867.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    CMOS analog integrated circuits
    low-voltage signal processing
    current to voltage conversion
    transresistor
    układy analogowe CMOS
    układy scalone CMOS
    przetwarzanie sygnałów
    konwersja prąd na napięcie
    transrezystor
    Opis:
    The paper presents a simple low-voltage transresistor attractive for on-chip analog-signal-processing. The proposed circuit offers not only an almost rail-to-rail operation and quite good linearity of DC transfer characteristic but also reasonably low value of its output resistance. This enables a voltage mode operation even if the transresistor is loaded by a not necessarily very high loading resistance. The obtained result is due to adding to the transresistor-input-stage a simple rail-to-rail voltage follower. The presented solution is an original proposal of the author. Input stage of the transresistor is built of only 4 MOS transistors and creates a simple quasi-linear current-to-voltage convertor. Output stage of it is built of 9 MOS transistors, plays a role of a very precise atypical voltage follower. In respect of simplicity and headroom, the proposed follower is better than conventional OA-based voltage followers. Preliminary simulation results are in a good agreement with the theory presented.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2016, 7, 2; 73-78
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A mixed signal ASIC for detection of acoustic emergency signals in road traffic
    Autorzy:
    Mielke, M.
    Schäfer, A.
    Brück, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/398059.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    automatyczne wykrywanie syren
    cyfrowe przetwarzanie sygnałów
    system wspomagania kierownicy
    zmiksowany sygnał układu scalonego
    automatic siren detection
    digital signal processing
    driver assistance system
    mixed signal integrated circuit
    Opis:
    In larger cities, emergency vehicles of fire services, emergency services, and police are often impeded by other road users. Although the emergency vehicles use visual and acoustic warning signals to become noticeable, they are not always perceived soon by other road users. This can lead to dangerous traffic situations, unacceptable delay for the emergency vehicle, and even accidents with other road users. To address this issue, and raise the awareness, and lower the reaction time of the driver, a driver assistance system was developed which monitors the ambient noise behind the car and informs the driver when an acoustic emergency signal is detected. Special attention was paid to simplicity of the algorithm for easy implementation in an integrated circuit. The circuit is not only applicable in road traffic. It can also form a basis for environmental sound interpretation for the use in assistive listening devices.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2010, 1, 2; 105-111
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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